no sure if you guys face this before,

- intro

usually we click print, select single printer, and having the print out,

- what we need

we click print, select single printer as usual, printer print out as usual, but another duplicate printer that we setting/program/create, will output the same print out also,

how to tackle this?

maybe a program that run hook dll monitor printer job, when detect job for printer A, will copy the job and sent to printer B?

Although I've never tackled this problem, and generally have moved away from printing anything; this question seems to provide some helpful links:
https://stackoverflow.com/questions/553051/how-to-query-the-print-queue-on-windows

I imagine watching one print queue and spawning jobs for other print queues as needed.

interesting, thanks bitRAKE